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BLOWER

HOUSING

2 SETSCREWS

(HIDDEN)

C99085

Fig. 20 -- Removal of Motor and Blower Wheel

A07680

Fig. 21 -- Burner Rack Removed

FEEDER TUBE

STUB TUBE

DEFROST

THERMOSTAT

C99029

Fig. 22 -- Defrost Thermostat Location

Outdoor Fan

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit

components.
Keep the outdoor fan free from all obstructions to ensure

proper cooling operation. Never place articles on top of the

unit.

CAUTION

1. Remove 6 screws holding outdoor grille and motor to top

cover.

2. Turn motor/grille assembly upside down on top cover to

expose the fan blade.

3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen the setscrew and slide the

fan off the motor shaft.

5. When replacing fan blade, position blade back to the same

position as before.

6. Ensure that setscrew engages the flat area on the motor shaft

when tightening.

7. Replace grille.

Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be
sure to turn off the gas supply, and then the electrical power to the

unit.
Remove access panels (see Fig. 19) to locate all the electrical
controls and wiring. Check all electrical connections for tightness.

Tighten all screw connections. If any discolored or burned
connections are noticed, disassemble the connection, clean all the

parts, re--strip the wire end and reassemble the connection properly
and securely.
After inspecting the electrical controls and wiring, replace the

access panels (see Fig. 19). Start the unit, and observe at least one
complete heating cycle and one complete cooling cycle to ensure

proper operation. If discrepancies are observed in any operating
cycle, or if a suspected malfunction has occurred, check each

electrical component with the proper electrical instrumentation.

Refer to the unit wiring label when making these checkouts.

NOTE

: Refer to the heating and/or cooling sequence of operation

in this publication as an aid in determining proper control
operation.

Refrigerant Circuit

Annually inspect all refrigerant tubing connections and the unit

base for oil accumulations. Detecting oil generally indicates a

refrigerant leak.

EXPLOSION,

PERSONAL

INJURY

AND

ENVIRONMENTAL HAZARD

Failure to follow this warning could result in personal injury,

death or property damage.
System under pressure. Relieve pressure and recover all

refrigerant before system repair or final unit disposal. Use all

service ports and open all flow--control devices, including

solenoid valves.

WARNING

If oil is detected or if low cooling performance is suspected,
leak--test all refrigerant tubing using an electronic leak--detector,

halide torch, or liquid--soap solution. If a refrigerant leak is

detected, refer to the Check for Refrigerant Leaks section.

677C

Содержание 677C--A

Страница 1: ...8 Main Burners 28 Outdoor Coil Indoor Coil Condensate Drain Pan 28 A09042 Fig 1 Unit 677C A Outdoor Fan 29 Electrical Controls and Wiring 29 Refrigerant Circuit 29 Gas Input 29 Indoor Airflow 29 Check Defrost Thermostat 29 PuronR Items 29 TROUBLESHOOTING 32 START UP CHECKLIST 32 SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire el...

Страница 2: ...earest equipment distribution office if any item is missing To prevent loss or damage leave all parts in original packages until installation Step 2 Provide Unit Support For hurricane tie downs contact distributor for details and PE Professional Engineering Certificate if required ROOF CURB Install accessory roof curb in accordance with instructions shipped with curb See Fig 4 Install insulation c...

Страница 3: ...3 A09146 Fig 2 677C A24 30 Unit Dimensions 677C A ...

Страница 4: ...4 A09147 Fig 3 677C A36 60 Unit Dimensions 677C A ...

Страница 5: ...up for unit being installed 2 Seal strip must be applied as required to unit being installed 3 Roof curb is made of 16 gauge steel 4 Attach ductwork to curb flanges of duct rest on curb 5 Insulated panels 1 in 25 4 mm thick fiberglass 1 lb density IMPORTANT Do not install large base pan HYBRID HEAT units onto the small base pan common curb The center of gravity on a large base pan HYBRID HEAT unit...

Страница 6: ... for operators of the lifting equipment should include but not be limited to the following 1 Application of the lifter to the load and adjustment of the lifts to adapt to various sizes or kinds of loads 2 Instruction in any special operation or precaution 3 Condition of the load as it relates to operation of the lifting kit such as balance temperature etc Follow all applicable safety codes Wear sa...

Страница 7: ...and other applicable local codes 2 Remove flue hood from shipping location inside the return section of the blower compartment see Fig 8 Remove the return duct cover to locate the flue hood Place flue hood assembly over flue panel Orient screw holes in flue hood with holes in the flue panel 3 Secure flue hood to flue panel by inserting a single screw on the top flange and the bottom flange of the ...

Страница 8: ... the ductwork connects to the roof curb See Fig 2 and 3 for connection sizes and locations Configuring Units for Downflow Vertical Discharge ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Before installing or servicing system always turn off main power to system There may be more than one disconnect switch Tag the disconnect switch with a suitable w...

Страница 9: ...11x10 279x254 3 4 FURNACE SECTION Burner Orifice Natural Gas Qty Drill Size Propane GasQty Drill Size 2 44 2 55 2 38 2 53 2 44 2 55 2 44 2 53 2 38 2 53 3 38 3 53 2 38 2 53 3 38 3 53 HIGH PRESSURE SWITCH psig Cut out Reset Auto 650 15 420 25 LOSS OF CHARGE LOW PRESSURE SWITCH Liquid Line psig Cut out Reset auto 20 5 45 10 RETURN AIR FILTERS Throwaway in mm 20x20x1 508x508x25 20x24x1 508x610x25 24x3...

Страница 10: ...andard filters must not exceed 0 08 IN W C If using accessory filter rack refer to filter rack installation instructions for correct filter size and quantity Table 2 Maximum Gas Flow Capacity NOMINAL IRON PIPE SIZE IN INTERNAL DIAMETER IN LENGTH OF PIPE FT m 10 3 0 20 6 1 30 9 1 40 12 2 50 15 2 60 18 3 70 21 3 80 24 4 90 27 4 100 30 5 125 31 1 150 45 7 175 53 3 200 61 0 1 2 622 175 120 97 82 73 66...

Страница 11: ...tage Connections When routing power leads into unit use only copper wire between disconnect and unit The high voltage leads should be in a conduit until they enter the duct panel conduit termination at the duct panel must be watertight The unit must have a separate electrical service with a field supplied waterproof disconnect switch mounted at or within sight from the unit Refer to the unit ratin...

Страница 12: ...ost economical operation the heat pump should operate above this temperature assuming it has sufficient capacity and the furnace should operate below this temperature 3 Comfort Balance Temperature When the heat pump is operating below this point the indoor supply air feels uncomfortable i e too cool This is purely subjective and will depend on the homeowner s idea of comfort Below this temperature...

Страница 13: ...re above balance point setpoint of thermostat 1 On a call for heating terminals Y and G of the Hybrid thermostat are energized The Y signal is sent to the Defrost Board DB terminal Y The DB has a built in five minute anti short cycle timer which will not allow the compressor to restart before the time delay has expired 2 T2 energizes the compressor contactor via the High Pressure Switch HPS and Lo...

Страница 14: ...efer to the unit rating plate For installations above 2 000 ft 610 m multiply the input by on the rating plate by the derate multiplier in Table 4 for correct input rate Table 4 Altitude Derate Multiplier for U S A ALTITUDE FT M PERCENT OF DERATE DERATE MULTIPLIER FACTOR 0 2000 0 610 0 1 00 2001 3000 610 914 8 12 0 90 3001 4000 315 1219 12 16 0 86 4001 5000 1220 1524 16 20 0 82 5001 6000 1524 1829...

Страница 15: ...e this range WARNING 3 Replace regulator cover screw on gas valve See Fig 13 4 Turn off gas supply to unit Remove manometer from pressure tap and replace pipe plug on gas valve See Fig 11 Turn on gas to unit and check for leaks Measure Manifold Pressure Propane Units Refer to propane kit installation instructions for properly checking gas input NOTE For installations below 2 000 ft 610 m refer to ...

Страница 16: ...tion and discharge pressures will be near zero Checking and Adjusting Refrigerant Charge The refrigerant system is fully charged with PuronR R 410A refrigerant and is tested and factory sealed Allow system to operate a minimum of 15 minutes before checking or adjusting charge NOTE Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper PuronR R 41...

Страница 17: ...d IFB Fig 14 and place vinyl cap over the connector on the wire 3 Connect the desired speed tap wire to the LOW terminal on the interface fan board IFB Two Cooling Fan Speeds Set up Dehumidification feature used IMPORTANT Dehumidification control must open control circuit on humidity rise above set point Use of the dehumidification cooling fan speed requires use of either a 24 VAC dehumidistat or ...

Страница 18: ...0 16 24X30X1 610X762x25 0 04 0 05 0 06 0 07 0 07 0 08 0 09 0 1 24X36X1 610X914X25 0 06 0 07 0 07 0 08 0 09 0 09 0 10 0 11 0 12 0 13 0 14 0 14 Table 8 677C A Wet Coil Pressure Drop Unit Size Standard CFM S C F M 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 24 0 06 0 07 0 08 0 09 0 1 30 0 12 0 15 0 19 0 23 0 27 36 0 07 0 11 0 18 0 26 0 35 42 0 04 0 07 0 1 0 15 0 21 48 0...

Страница 19: ...Med Low2 Pink CFM 898 820 738 662 536 Heating Rise oF 49 54 NA NA NA NA NA NA NA Heating Rise oC 27 30 NA NA NA NA NA NA NA Medium Red CFM 973 887 823 733 665 538 451 Heating Rise oF 46 50 54 NA NA NA NA NA NA Heating Rise oC 25 28 30 NA NA NA NA NA NA Med High Orange CFM 1140 1064 996 915 840 758 687 564 480 Heating Rise oF 39 42 45 49 53 NA NA NA NA Heating Rise oC 22 23 25 27 29 NA NA NA NA Hig...

Страница 20: ...27 974 921 Heating Rise oF 33 35 36 37 39 41 43 46 48 Heating Rise oC 18 19 20 21 22 23 24 25 27 Medium Red CFM 1505 1452 1413 1358 1323 1282 1234 1169 1130 Heating Rise oF 30 31 31 33 34 35 36 38 39 Heating Rise oC 16 17 17 18 19 19 20 21 22 Med High2 Orange CFM 1545 1492 1449 1411 1362 1313 1278 1231 1188 Heating Rise oF 29 30 31 31 33 34 35 36 37 Heating Rise oC 16 17 17 17 18 19 19 20 21 High ...

Страница 21: ...CFM 1345 1282 1235 1194 1140 1095 1027 974 921 Heating Rise oF 51 53 55 57 60 62 NA NA NA Heating Rise oC 28 29 31 32 33 35 NA NA NA Medium1 Red CFM 1505 1452 1413 1358 1323 1282 1234 1169 1130 Heating Rise oF 45 47 48 50 51 53 55 58 60 Heating Rise oC 25 26 27 28 29 29 31 32 33 Med High2 Orange CFM 1545 1492 1449 1411 1362 1313 1278 1231 1188 Heating Rise oF 44 46 47 48 50 52 53 55 57 Heating Ris...

Страница 22: ...Pink CFM 1678 1635 1602 1558 1513 1474 1438 1404 1349 Heating Rise oF 57 59 60 62 64 65 NA NA NA Heating Rise oC 32 33 33 34 35 36 NA NA NA Medium Red CFM 1962 1915 1880 1843 1794 1753 1711 1675 1628 Heating Rise oF 49 50 51 52 54 55 56 57 59 Heating Rise oC 27 28 28 29 30 31 31 32 33 Med High1 Orange CFM 2131 2088 2065 2013 1982 1941 1888 1860 1785 Heating Rise oF 45 46 47 48 49 50 51 52 54 Heati...

Страница 23: ...9 36oC Low Blue CFM 1448 1321 1282 1235 1192 1145 1101 1057 1011 Heating Rise oF NA NA NA NA NA NA NA NA NA Heating Rise oC NA NA NA NA NA NA NA NA NA Med Low Pink CFM 1722 1675 1614 1543 1499 1442 1408 1356 1308 Heating Rise oF 56 57 60 62 64 NA NA NA NA Heating Rise oC 31 32 33 35 36 NA NA NA NA Medium2 Red CFM 1887 1847 1783 1726 1677 1625 1578 1527 1432 Heating Rise oF 51 52 54 56 57 59 61 63 ...

Страница 24: ...24 A09068 Fig 15 208 230 1 60 Wiring Diagram Unit 677C A 677C A ...

Страница 25: ...25 A09209 Fig 16 208 230 3 60 Wiring Diagram Unit 677C A 677C A ...

Страница 26: ...26 50VT500173 REV 4 0 A09099 Fig 17 Cooling Charging Table Subcooling 677C A ...

Страница 27: ...Check and inspect heating section before each heating season Clean and adjust when necessary 6 Check flue hood and remove any obstructions if necessary Air Filter IMPORTANT Never operate the unit without a suitable air filter in the return air duct system Always replace the filter with the same dimensional size and type as originally installed See Table 1 for recommended filter sizes Inspect air f...

Страница 28: ...curs unit may be reset by either momentarily interrupting power supply to unit or by turning selector switch to OFF position at the thermostat Main Burners At the beginning of each heating season inspect for deterioration or blockage due to corrosion or other causes Observe the main burner flames and adjust if necessary Removal of Gas Train To remove the gas train for servicing 1 Shut off main gas...

Страница 29: ...oticed disassemble the connection clean all the parts re strip the wire end and reassemble the connection properly and securely After inspecting the electrical controls and wiring replace the access panels see Fig 19 Start the unit and observe at least one complete heating cycle and one complete cooling cycle to ensure proper operation If discrepancies are observed in any operating cycle or if a s...

Страница 30: ...es Pressure switches are protective devices wired into control circuit low voltage They shut off compressor if abnormally high or low pressures are present in the refrigeration circuit These pressure switches are specifically designed to operate with Puron R 410A systems R 22 pressure switches must not be used as replacements for the Puron R 410A system OF2 OF1 ON QUIET SHIFT 120 30 60 60 30 90 IN...

Страница 31: ... be shut off if possible for most troubleshooting techniques Refrigerants present additional safety hazards EXPLOSION HAZARD Failure to follow this warning could result in personal injury or death and or property damage Wear safety glasses and gloves when handling refrigerants Keep torches and other ignition sources away from refrigerants and oils WARNING The scroll compressor pumps refrigerant th...

Страница 32: ...WARNING Refrigerant System This information covers the refrigerant system of the 677C A including the compressor oil needed servicing systems on roofs containing synthetic materials the filter drier and refrigerant charging Compressor Oil If additional oil is needed use Uniqema RL32 3MAF If this oil is not available use Copeland Ultra 32CC or Mobil Artic EAL22CC This oil is extremely hygroscopic m...

Страница 33: ...CKLIST Use Start Up checklist to ensure proper start up procedures are followed PURONR R 410A QUICK REFERENCE GUIDE S Puron refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with Puron S Puron refrigerant cylinders are rose colored S Recovery cylinder service pressure rating must be 400 psig DOT 4BA4...

Страница 34: ...e restriction and remove Compressor operates continuously Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat set too low Reset thermostat Low refrigerant charge Locate leak repair and recharge Mechanical damage in compressor Replace compressor Air in system Recover refrigerant evacuate system and recharge Frosted coil with incorrect defrost oper...

Страница 35: ...f the indoor evaporator fan motor Ensure that the supply air temperature rise is in accordance with the range on the unit nameplate Clean or replace filters Flame sense fault LED 3 flashes The IGC sensed flame that should not be present Reset unit If problem persists replace control board 4 consecutive limit switch faults LED 4 flashes Inadequate airflow to unit Check the operation of the indoor e...

Страница 36: ...ESSOR AMPS INDOOR EVAPORATOR FAN AMPS TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB HEAT PUMP SUPPLY AIR__________________ GAS HEAT SUPPLY AIR PRESSURES GAS INLET PRESSURE IN W C GAS MANIFOLD PRESSURE IN W C REFRIGERANT SUCTION PSIG SUCTION LINE TEMP REFRIGERANT DISCHARGE PSIG LIQUID TEMP VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GAS ...

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